Development of highly corrosion-resistant tinplate with nickel-diffusion treatment in a continuous annealing process

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5451758

Mochizuki, K; Nakakouji, H; Ogata, H; Ichida, T; Irie, T ^[1]

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1. Kawasaki Steel Corporation, Chiba (Japan)

A new type of nickel-diffusion pre-treatment in a continuous annealing line for highly corrosion-resistant tinplate was developed. Steel sheets are thinly nickel-plated (nickel coating weight 0.07g/m{sup 2}) in a continuous annealing line, subsequently annealed with a conventional heating cycle (at 700 C for 20 sec.) and then tinplated. Nickel content after annealing is about 20wt% at the surface and the diffusion depth is a few thousands {angstrom}. One of the reasons why the nickel-diffusion treated tinplate shows good corrosion resistance is that the corrosion potential difference, {triangle}E, between the base steel and tin deposit decreases due to the formation of the Fe-Ni alloy layer. {triangle}E of the nickel-diffusion treated base steel is about 10mV, though {triangle}E of the conventional base steel is as high as 130mV. For welded can, a new lightly tin-coated steel was developed by using this method with Sn less than lg/m{sup 2}.

• OSTI ID: 5451758
• Report Number(s): CONF-840909--
• Journal Information: TMS (The Metallurgical Society) Paper Selection; (USA), Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Vol. 56; ISSN TMPSA; ISSN 0197-1689
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ANNEALING
CORROSION RESISTANT ALLOYS
DEPOSITION
DEPTH
DIFFUSION
DIMENSIONS
ELEMENTS
FABRICATION
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
METALS
NICKEL
PLATING
QUANTITY RATIO
STEELS
SURFACE COATING
TIN
TRANSITION ELEMENTS